The marquee matchup was initially announced by Mayweather via his Twitter account on May 29 setting the sports world abuzz. The bout will be a Super Welterweight World Championship contested for the WBC, WBA Super, WBA and Ring Magazine Super Welterweight World Championships on Mexican Independence Day weekend, one of the two biggest weekends on the boxing calendar. The fight will be promoted by Mayweather Promotions, Golden Boy Promotions and Canelo Promotions.

The event is sponsored by Corona, O'Reilly Auto Parts and Valvoline and will be produced and distributed live by SHOWTIME PPV® beginning at 9:00 p.m. ET/6:00 p.m. PT. The event can be heard in Spanish using secondary audio programming (SAP).

Tickets priced at $2,000, $1,500, $1,000, $600 and $350, not including applicable service charges and taxes, with a total ticket limit of 12 per person (a limit of 10 per person at the $2,000, $1,500, $1,000 and $600 price levels and a limit of two [2] per person at the $350 price level), go on sale Tuesday, June 25 at 1:00 p.m. ET/10:00 a.m. PT. To charge by phone with a major credit card, call Ticketmaster at (800) 745-3000. Tickets also will be available for purchase at www.mgmgrand.com or www.ticketmaster.com.

Mayweather, who usually campaigns at 147 pounds, chose the younger and bigger Canelo as his opponent for the second bout of his new contract with Showtime Networks Inc. and its parent company, CBS Corporation.

"I picked Canelo because he deserves the chance and is the best opponent possible for me at this time," said Mayweather, who is coming off of a near shutout win on May 4 over Six-Time and Four-Division World Champion Robert Guerrero. "When I signed my new deal with Showtime and CBS, I said I was going to stay active and fight the best fighters and I am keeping my word. I looked at several different fighters and decided to pick Canelo because he can give me a great fight and one the fans are going to appreciate. Sure it's a risk to fight a guy that is younger and bigger than me, but I love taking risks. Be ready because I'm in fantastic shape and I'm going to train even harder for this fight than I did for my last one. He might be a big, young, strong and talented champion, but my experience and work ethic make me believe that I'm that much better and no one in boxing can beat me right now."

Canelo is coming off of a unanimous decision win over then WBA World Champion Austin Trout in front of a sold-out crowd of nearly 40,000 at the Alamodome in San Antonio, Texas on April 20. The young champion has been soliciting to fight Mayweather for some time and is excited to challenge boxing's best fighter in what could be a career-defining fight for the Mexican superstar.

"I'm ready for the big challenges and now I have to prove it against Floyd Mayweather on September 14," said Canelo. "I said that I wanted to fight the best and here I am in front of the best pound-for-pound fighter, who I respect for his achievements, but on September 14, I will write a new page in boxing history because I'm going to be victorious. This fight is for all of my fans, my family and of course for Mexico because we're fighting on the weekend of Mexico's Independence. I've waited so long for this and my only option is to WIN!"

"It's a done deal and I commend Floyd for selecting Canelo Alvarez as his next challenge," said Leonard Ellerbe, CEO Mayweather Promotions. "Floyd is a great champion who has earned the right to control the destiny of his career. To select a young, strong and bigger opponent in Canelo, who has proven he is at the championship level with his success to date, is just another indication of Floyd's love for the sport and the fans that embrace him every time he steps in the ring. It's his legacy on the line September 14 and I have no doubt that he will be victorious again."

"This is THE ONE. The one fight everyone wants to see as Mayweather is the best ONE ever and no ONE has ever been able to find a way to beat him," said Richard Schaefer, CEO of Golden Boy Promotions. "Will he stay undefeated or will Canelo be the first ONE to beat him? My hat goes off to Floyd for accepting the challenge of a young, strong and undefeated fighter like Canelo and my hat goes off to Canelo for agreeing to fight the best fighter in the world. These are modern day gladiators who know how to entertain and on September 14, the world will stop and watch to see who will be THE ONE! Mayweather vs. Canelo is without doubt ONE of the biggest boxing events of all-time."

"The response to the announcement of this event, from all corners of sports and entertainment, has been overwhelming," said Stephen Espinoza, executive vice president and general manager, SHOWTIME Sports. "It's a natural response when the two most skilled and most popular athletes in a sport face off against each other. I commend both Floyd and Canelo for making the best fight possible. Neither man ever waivered in their desire to give the fans what they've been clamoring for."